> whereas under 1.3 fixity it parses as:
>
> > main :: IO ()
> > main = f >>
> >(dropOut cond1 $
> > (g >>
> > (dropOut cond2 $
> > h)
> >
> > dropOut :: Bool -> IO () -> IO ()
> > dropOut gotError cont | gotError = return ()
> > | otherwi
*** I was originally posting to ask a question, but I've solved the
*** question through trying to ask it. :-) I've included the mail
*** anyway in case anyone finds it useful.
|The fixity only makes a difference when you consider an expression
|like f >>= g >>= h, where, for example, f,g,h a
Well, Mark was faster, the text below basically says the same thing.
On Tue, 15 Dec 1998, Malcolm Wallace wrote:
> Just a quickie:
> I see that the fixity decl of the monad operation >> and >>= changed
> from right associative in 1.3 to left associative in 1.4. This strikes
> me as a bug in 1.4
| Right associativity allows:
| f >>= \x->
| g >>= \y->
| h x
| which with left associativity will be rejected because x is unbound
| (in h x), or even worse: if x is bound at an outer scope, you might get
| completely the wrong value (or if you're lucky a type error).
No worries here
Just a quickie:
I see that the fixity decl of the monad operation >> and >>= changed
from right associative in 1.3 to left associative in 1.4. This strikes
me as a bug in 1.4 which ought to be reversed in 98.
Right associativity allows:
f >>= \x->
g >>= \y->
h x
which with left asso
